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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

STMicroelectronics TIP41A

Name: TIP41A
Brand: STMicroelectronics
SKU: TIP41A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIP41A

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: TIP41A.pdf

Description:: TRANS NPN 60V 6A TO-220

Quantity:: RFQ Add To RFQ list

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Inventory:5,684

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Product details

Overview

TIP41A from STMicroelectronics is an NPN silicon power transistor in TO-220 package, designed for linear amplification and switching applications with 60 V V_CEO, 6 A I_C, and 65 W P_TOT at T_case = 25°C; used in audio amplifier output stages and DC power control circuits.

For engineers reviewing the TIP41A datasheet, TIP41A pinout, TIP41A application, or TIP41A equivalent, key selection criteria include V_CEO/V_CBO rating, h_FE linearity at 0.3–3 A, V_CE(sat) ≤1.5 V at I_C = 6 A/I_B = 0.6 A, thermal derating above 25°C case temperature, and complementary pairing with TIP42A.

Technical Context

The TIP41A employs silicon base island technology to improve h_FE linearity across collector current (30–75 at I_C = 0.3 A and 15–75 at I_C = 3 A) and reduce saturation voltage drift. It supports both linear-mode biasing and hard-switching operation with 300 μs pulsed test conditions.

Its complementary PNP counterpart TIP42A shares identical absolute maximum ratings and mechanical form factor, enabling push-pull and H-bridge configurations without thermal or layout mismatch. The device operates up to 150°C junction temperature with −65°C to 150°C storage range.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - maximum safe collector-emitter voltage under open-base condition; defines upper rail limit in linear amplifier or switching supply designs
I_C	6 A - continuous DC collector current; sets minimum heatsink requirement for sustained conduction
P_TOT	65 W at T_case = 25°C - total power dissipation limit; requires thermal derating above 25°C case temperature
h_FE	30–75 (I_C = 0.3 A), 15–75 (I_C = 3 A) - DC current gain range indicating usable linear region for Class AB audio output stage design
V_CE(sat)	≤1.5 V at I_C = 6 A / I_B = 0.6 A - low saturation voltage reduces conduction loss in switching applications
f_T	Not specified - no small-signal transition frequency provided; not intended for RF or high-frequency switching (>100 kHz)

Pinout & Package

TO-220 plastic package with vertical mounting orientation, metal tab electrically connected to collector, and JEDEC-standard 3-pin configuration. Tab is thermally conductive and must be isolated from chassis unless collector is at ground potential.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Low-impedance path for full load current; connects to ground or negative rail in common-emitter configuration
2 (Base)	Control input	Requires ~0.6 A drive current for full saturation at 6 A collector; needs series resistor to limit base current from driver stage
3 (Collector / Tab)	Main current source and thermal interface	Electrically tied to metal tab; must be insulated from heatsink if collector voltage ≠ chassis ground; primary heat transfer path

Key Features

Feature	Design Value
Complementary PNP-NPN pairing	Enables matched push-pull output stages with TIP42A, minimizing crossover distortion in audio amplifiers
Improved h_FE linearity	Gain remains stable across 0.3–3 A collector current range, supporting predictable biasing in Class AB linear amplifiers
High switching speed	Turn-on time (t_on) and resistive-load switching times characterized per Figure 9/11; suitable for <100 kHz PWM motor control
ECOPACK® lead-free construction	Meets RoHS requirements with lead-free second-level interconnect; marked on package and inner box label per JESD97

Applications

Audio Power Amplifier

DC Motor Driver

Use Scenario: Output stage of 20–50 W Class AB stereo amplifier driving 4–8 Ω speakers.

IC Role / Device Role / Timing Role: NPN power switch amplifying line-level signal into speaker current; operates in linear region with fixed bias network.

Use Value: h_FE linearity ensures low THD across output current swing; V_CE(sat) ≤1.5 V minimizes idle-stage voltage drop and thermal load.

Use Scenario: Single-direction H-bridge half-bridge leg controlling 12–24 V brushed DC motors up to 5 A.

IC Role / Device Role / Timing Role: High-side or low-side switching element; driven by logic-level gate driver or optocoupler-isolated base circuit.

Use Value: 60 V V_CEO supports back-EMF suppression in inductive loads; 6 A I_C handles peak stall currents without secondary protection.

Linear Voltage Regulator

Power Supply Switch

Use Scenario: Pass transistor in adjustable 3–30 V, 3 A linear regulator using LM317 feedback network.

IC Role / Device Role / Timing Role: Series pass element dissipating excess input-output differential as heat; biased in active region.

Use Value: 65 W P_TOT at 25°C allows ≥20 W continuous dissipation with moderate heatsinking; V_CEO = 60 V enables wide input range designs.

Use Scenario: Main switching transistor in 24 V industrial power supply ON/OFF control or emergency shutdown circuit.

IC Role / Device Role / Timing Role: Hard-saturated switch turning main DC bus on/off; driven with sufficient base current for fast turn-on/turn-off.

Use Value: Verified resistive-load switching times (Fig. 11/13) support reliable 10–50 kHz cycling; TO-220 tab enables direct heatsink mounting for reliability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJE13003	Lower V_CEO (400 V), higher I_C (12 A), but lower h_FE (min 5 at I_C = 2 A); TO-220 package	Better suited for flyback SMPS primary switching; less linear gain for audio use	Select when high-voltage switching dominates over linearity or thermal stability
2N3055	Same V_CEO (60 V), lower I_C (15 A), but significantly lower h_FE (20–70 at I_C = 4 A); TO-3 metal package	Larger thermal mass, slower switching, legacy audio/linear use; no ECOPACK compliance	Choose only for backward-compatible repairs or where TO-3 mechanical fit is mandatory

Compared with MJE13003 and 2N3055, the TIP41A offers superior h_FE linearity for analog amplification, tighter V_CE(sat) control at 6 A, and RoHS-compliant ECOPACK packaging-making it optimal for new audio and medium-speed switching designs requiring predictable gain behavior.

Availability

TIP41A is available at Aetrix Electronics and suitable for audio amplifier output stages, DC motor drivers, linear voltage regulators, and industrial power supply switches requiring stable component supply and JEDEC-standard TO-220 compatibility.

Supply support for TIP41A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power transistors, sensors, and analog ICs for industrial, automotive, and consumer markets.

The TIP41A belongs to ST's legacy silicon power transistor family, engineered specifically for cost-sensitive, medium-power linear and switching applications where robustness, thermal performance, and complementary pairing are essential.

FAQ

Is the TIP41A RoHS compliant?

Yes, the TIP41A is manufactured in STMicroelectronics' ECOPACK® package with lead-free second-level interconnect, fully compliant with RoHS Directive 2011/65/EU. The ECOPACK marking appears on both the device package and inner box label per JEDEC Standard JESD97.

What is the maximum safe operating temperature for continuous use?

The TIP41A has a maximum junction temperature (T_J) of 150°C and a storage temperature range of −65°C to +150°C. For continuous operation, case temperature must be maintained ≤25°C to achieve full 65 W dissipation; derating is required at higher case temperatures per the datasheet thermal curve.

Can the TIP41A be used in parallel configurations?

Yes, but only with emitter ballast resistors (typically 0.1–0.47 Ω) to ensure current sharing. The device's positive temperature coefficient of V_BE supports self-balancing, but mismatched h_FE and thermal gradients require external balancing for reliable parallel operation above 8 A total current.

Does the metal tab connect to a specific pin internally?

Yes, the metal tab is internally connected to the collector (Pin 3). This must be considered during heatsink isolation: if the collector is not at chassis ground potential, electrical insulation (e.g., mica washer + thermal paste) is mandatory between tab and heatsink to prevent short circuits.

TIP41A Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 6 A

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 1.5V @ 600mA, 6A

Current - Collector Cutoff (Max):: 700µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 15 @ 3A, 4V

Power - Max:: 2 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

TIP41A FAQ

1.How can I place an order for TIP41A through Aetrix?

Please submit a Request for Quotation (RFQ) for TIP41A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TIP41A reliable?

The price and inventory of TIP41A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP41A is usually 5 days.

3.What payment methods are accepted for TIP41A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP41A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIP41A?

TIP41A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIP41A order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TIP41A?

For technical support, including TIP41A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP41A requirements.

6.How does Aetrix verify that TIP41A is sourced from the original manufacturer or authorized distributors?

All TIP41A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TIP41A meets industry standards.

7.What is the process for return or replacement of TIP41A?

All TIP41A units undergo pre-shipment inspection (PSI). If there is an issue with TIP41A, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TIP41A part is unused and in its original packaging.

Return procedure for TIP41A:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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